Car-sharing service Lyft has acquired Hitch, a startup in the mobile app-enabled car-pooling business, to integrate the service with its own shared rides business that it set up last month.

“Similar to Lyft, Hitch has always believed the shared rides experience is inherently social, and we’re excited that they’re joining the team to accelerate this movement together,” Lyft wrote in a blog post Monday.

Hitch co-founders Snir Kodesh and Noam Szpiro will join the Lyft team as the company expands personal transit to more cities across the U.S. Hitch offers its service in San Francisco.

“We observed too many empty cab seats and noticed that public transit could be improved with the addition of dynamic routing,” the Hitch co-founders wrote in a blog post. “We built an app, a sophisticated engine optimized for pairings, and started to grow our platform—with new users and drivers alike.”

The Hitch platform will close for drivers and passengers starting Tuesday. Current Hitch drivers will move to the Lyft community, to which many are already signed on as ride-sharing drivers, Lyft said.

The company said it had seen “incredible” growth and demand for its shared rides business Lyft Line in San Francisco, which launched in August. Lyft Line held out the promise that it would connect people with a ride already going the same way for up to 60 percent less than an original Lyft ride. Lyft Line would roll out first in San Francisco on iOS, with support on Android and services in other cities to follow, the company said at launch.

Rivals Uber and Sidecar have also begun similar car-pooling services.

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